package src.ThreadH.exercise;

/**
 * @author Vince
 * @create 2024-07-05-09:30
 * <p>
 * 案例2:生产者&消费者
 * 生产者(Productor)将产品交给店员(Clerk)，而消费者(customer)从店员处取走产品，店员一次只能持有
 * 固定数量的产品(比如:20)，如果生产者试图生产更多的产品，店员会叫生产者停一下，如果店中有空位放产品
 * 了再通知生产者继续生产，如果店中没有产品了，店员会告诉消费者等一下，如果店中有产品了再通知消费者来
 * 取走产品。
 * <p>
 * 共享数据：产品
 * 线程：生产者  消费者
 */
public class Test3 {
    public static void main(String[] args) {

        Clerk clerk = new Clerk();

        Productor productor = new Productor(clerk);

        Customer_ customer_ = new Customer_(clerk);
        Customer_ customer_1 = new Customer_(clerk);

        Thread t = new Thread(productor);

        t.start();
        customer_.start();
        customer_1.start();


    }
}


class Clerk extends Thread {

    public int getProduct() {
        return product;
    }

    public void setProduct(int product) {
        this.product = product;
    }

    private int product;


    synchronized void addProduct() {

        if (product >= 20) {
            try {
                System.out.println("目前产品存量太多，请等待");
                wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        } else {
            notifyAll();
            System.out.println("Thread is -------> " + Thread.currentThread().getName() + "生产 product num is ---> " + (product + 1));
        }

    }

    ;

    synchronized void minusProduct() {
        if (product <= 0) {
            try {
                System.out.println("目前产品存量不够，请等待");
                wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        } else if (0 < product && product <= 20) {
            notifyAll();
            System.out.println("Thread is -------> " + Thread.currentThread().getName() + "消费 product num is ---> " + (product - 1));
        }
    }

    ;

}


class Productor implements Runnable {

    Clerk clerk;

    Productor(Clerk clerk) {
        this.clerk = clerk;
    }

    @Override
    public void run() {
        while (true) {
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            System.out.println("开始生产产品" + (clerk.getProduct() + 1));
            clerk.addProduct();
        }
    }
}


class Customer_ extends Thread {
    Clerk clerk;

    Customer_(Clerk clerk) {
        this.clerk = clerk;
    }

    @Override
    public void run() {
        while (true) {
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            System.out.println("开始消费产品------>" + (clerk.getProduct() + 1));

            clerk.minusProduct();
        }
    }
}